Stream-line sail



Jan. 29, 1929.

E. H. WILLIAMS STREAM LINE SAIL Filed April 2, 1928 2 Sheets-Sheet Buvcntor Jan. 29, 1929. 1,700,660

E. H. WILLIAMS STREAM LINE SAIL Filed April 2. 1928 2 sheets-sneer 2 1 f "Sm l? ci,

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JT J Je 02 Bnvcntor in the channel guide Q, see Figures 3 and 4. stream line cross section, rounded ih front for small sails, such bearings will be unnecesfor' slidably attaching" the leading edgeL of sary, as it will beentirely practicable to said sail to said channel guide, a boom pivotl' .hOSt .the Sail by pulling down on. the halally connected to said casing, means for conyards, and omittingany anti-friction l arnecting the foot of said sail to said boom, and rangement. i means for hoisting or lowering the head. of Assuming the sailto be hpisted, Aandthe said sail.

also provides the location ofthe center of v bottom edge m rear lower edge ofthe ca ing with reinforced bracketed-I, as shown in etail in Figure 4, and through whichbrackets the pinv I passes. This pin may be provided with a suitable handle I in the form of a ring for convenience in assembling,and it may be held in place by the lock pin z'. The pin I passes throughthe eye j of the swivel-bearing which has the-yoked arms J2 engaging the boom J, as shown in detail in Figures 2 and 4. Attached to the upper part of the rotary casing, I provide the bracket K in which the pulley K" is journalled, over which passes the halyards L for hoisting the sail. These halyards may consist of a rope or wire cable which is secured to the head m of the\ sail M, and /passing over/the pulleys K and K2 is secured to the cleat K3 near the bottom of the casing, as shown in Figure 1 I have shown the sail-M triangular, but 0b- Viously other forms may be adopted. The of the sail is secured to the boom J in any convementway as by thelacing N. The leading edge of the sail is con# nected to the `rotary casi-ng, in such Aa vvay that the/head of the sail may be raised or lowered, as desired. Various arrangements may be provided for so connecting the sail to the mast casing, and `I have shown one method of accomplishing this, which will now be described.

P represents a guide, the rear end of whichis attached to the sail, and the front edge terminates in a ball guide p, which is held between the ends dvof the curved plate D in rear of the channel way. Q, see Figure 4. v

This lower guide P is attached to. the `forward clew m3 of the sail, asy shown in Fi ure 2. Above the guide I?, I provide a series o other guides P', each having a T head p engaging Furthermore, the sail, comprising in part the mast casing referred to, isvery readily shifted in tacking or going about. Again the herein described ar angement provides a sail which may be ve y readily reefed, or \part of which may be housed to meet increasing wind velocities, and in which the sail tion. The invention primarily is intended t kprovide a mast-attachment adapted for use t \It.wil1 be obvious that various chan es.

might be made in the construction, com ination and arrangement of parts, which could be used without departing from the spirit of my invention, arid I do not mean to limit the invention to such details except as particularly pointed out iin the claims.

Having thus described my invention, what maybe quickly restored to the initial condi- I claim and desire to secure by Letters Patent ofqthe United States. is: y

1. In a sail boat the combination with a mast of acasing'revolubly mounted on said.

mast, the casixng. having its outer surface of.

streamline cross section, rounded in ffgront and tapering to the rear, wlth an open verotical slot to the rear, a channel guide mounted in front of said slot, a fore and aft sail, means for slidably attaching the leading edge of said sail to said channel guide and means for hoist-v ing or lowering the head of said sail.l

2. In a sail boat the combination with a mast of a casing revolubly mounted on said l mast, the casing having its outer surfade of While I have shown ordinary T guides travelj and tapering tothe rear, with an openfvertical4 lng in a channel guide way, obviously antr- -slot to the rear, a channel guide mounted in A frlction bearmgs mayebe used 1f desired, but front of said slot, a fore and aft sail, means f parts to be in the position shown in Figure 1,in reaching lto Windward, the'mast casing will mastof a casing revolubly lmounted in said form a continuation of the sail, and which mast, the casing having its outer surfane of will project not only to, the rear of but also stream line cross section, rounded infront in front of themast; and they stream line and projecting in 'front of saidf mast and 120 shape of the casing will not only very matapering to the rear of said mast, with a subterially decreasevthe head or wind reslstance, stantially vertical channel guide provided at but will also eliminate any. eddy currents its rear, afore and aft sail,\means for slidably aroundkthe mast and the sail, andfwill 1nattaching the leading edge of said sail to crease lthe'eiiciency of the sailas a motive said channel guide and means for hoisting or 1,25

' The .hereln described construction lowering the head of said sail.

4. Ina sailboat the combination with a pressure bn the sail closer to the mast-than mast ofa casing revolubly mounted on said with other forms of sail now generally in mast, the casinghaving its outer surface of use, with resulting advantages.

power.

3. In a sall boat the colfnbination wit-li a stream line cross section, rounded .in front "130 and projecting in front of said mast, and tapering to the rear of said mast, With a substantially vertical channel guide provided at its rear, a fore and aft sail, means for slidahly attaching the leading edge of said sail to said channel guide, a boom pivotally connected to said casing', means for connecting the foot of said sail to said boom, and means for hoisting or lowering` the head of said sail.

. A sail comprising a casing adapted to he rcvolubly mounted on a mast, the casingr having itsl outer surface of stream line cross section.1 rounded in front and tapering to the rear, with an open Vertical slot to the rear, a

channel guide mounted in front of said slot.

and a fore and aft sheet ot" textile fabric with means for slidahly attaching the leading edge of said sheet to se id channel guide.

6. A sail comprising a casing adapted to be revolubly mounted on a mast, the casing havingr its outer surface of stream line cross section, rounded in front and tapering to the rear, with an open vertical slot to the rear, a channel guide mounted in front of said slot, and a fore and aft sheet oftextile fabric with means for slidably attaching the leading edge of said sheet to said channel guide, and means for hoisting or lowering the head of said sail.

ELMo HAMILTON WILLIAMS. 

